A nice clean accommodation in Bangkok. A stone throw from the apartment there is a busy street with all kinda of food and shops.
A 10 minute walk to the main road will bring you to the BTS railway station. This train will take you all the way to downtown and to the Suvarnabhumi Airport (the railway to Don Mueang Airport has not yet been completed).
Sure it's not right downtown in the heart of the hustle and bustle but for the price it's great. Very convenient, and quiet at night.
Also, there is a floating market not far from here!